YG-1 20110211 5/8-11 GH5 P-HSS Spiral Flute Bottom Tap
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The YG-1 20110211 is a new 5/8-11 UNC spiral flute bottoming tap manufactured from P-HSS (powder metallurgy high-speed steel, grade H8645) with a black oxide surface treatment, designed for tapping blind holes to the bottom where conventional taps cannot reach. The spiral flute geometry evacuates chips upward out of the hole, making this tap especially effective in blind-hole applications in materials such as carbon steel, alloy steel, and cast iron. The GH5 tolerance class specifies a thread limit of +0.0005 in to +0.0025 in over basic pitch diameter, suitable for producing 2B and 3B class-of-fit threads. The square shank drive end is compatible with standard tap wrenches and machine collets sized for 5/8 in shank taps. Made in Korea by YG-1, a manufacturer whose P-HSS taps are widely used in CNC machining centers and production tapping applications.
Product Specifications
| Brand | YG-1 |
| Part Number (MPN) | 20110211 |
| Thread Size | 5/8-11 UNC |
| Thread Standard | UNC (Unified National Coarse) |
| Tap Type | Spiral Flute Bottoming Tap |
| Thread Tolerance / Limit | GH5 |
| Material | P-HSS (Powder Metallurgy HSS, H8645) |
| Coating / Finish | Black Oxide |
| Shank Type | Square Drive |
| Country of Origin | Korea |
| Hand of Cut | Right Hand |
| Chamfer Style | Bottom (1–2 thread chamfer) |
| Number of Flutes | 3 |
| Condition | New |